Investments

3 Months Ended

Mar. 31, 2015

Investments, Debt and Equity Securities [Abstract]

Investments

Investments

Cash, cash equivalents and investments as of March 31, 2015 included the following:

(in thousands)	AMORTIZED COST		GROSS UNREALIZED GAINS		GROSS UNREALIZED LOSSES			FAIR VALUE
Cash and cash equivalents:
Cash and money market accounts	$	113,450	$	—	$	—		$	113,450
Total cash and cash equivalents	$	113,450	$	—	$	—		$	113,450
Investments:
Certificates of deposit (due within 1 year)	$	23,859	$	2	$	(6	)	$	23,855
Certificates of deposit (due within 2 years)	5,389		2		—			5,391
Commercial paper (due within 1 year)	5,993		1		(1		)	5,993
Corporate bonds (due within 1 year)	20,422		—		(37		)	20,385
Corporate bonds (due within 2 years)	4,198		—		(15		)	4,183
Government agencies (due within 1 year)	6,056		—		(3		)	6,053
Total investments	$	65,917	$	5	$	(62	)	$	65,860
Total cash, cash equivalents, and investments	$	179,367	$	5	$	(62	)	$	179,310

Cash, cash equivalents and investments as of December 31, 2014 included the following:

(in thousands)	AMORTIZED COST		GROSS UNREALIZED GAINS		GROSS UNREALIZED LOSSES			FAIR VALUE
Cash and cash equivalents:
Cash and money market accounts	$	84,613	$	—	$	—		$	84,613
Certificates of deposit	472		—		—			472
Corporate bonds	501		—		—			501
Total cash and cash equivalents	$	85,586	$	—	$	—		$	85,586
Investments:
Certificates of deposit (due within 1 year)	$	25,823	$	—	$	(9	)	$	25,814
Certificates of deposit (due within 2 years)	4,429		1		(3		)	4,427
Commercial paper (due within 1 year)	5,988		1		(3		)	5,986
Corporate bonds (due within 1 year)	16,487		—		(24		)	16,463
Corporate bonds (due within 2 years)	13,912		—		(64		)	13,848
Government agencies (due within 1 year)	6,082		—		(6		)	6,076
Total investments	$	72,721	$	2	$	(109	)	$	72,614
Total cash, cash equivalents, and investments	$	158,307	$	2	$	(109	)	$	158,200